@article{RSMUP_1978__59__67_0,
     author = {Amerio, Luigi},
     title = {Continuous solutions of the problem of a string vibrating against an obstacle},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {67--96},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {59},
     year = {1978},
     mrnumber = {547080},
     zbl = {0423.73046},
     language = {en},
     url = {http://www.numdam.org/item/RSMUP_1978__59__67_0/}
}